Re: [Quickfixj-users] QuickFIX - Query on multi tenant support

[Christoph J. <chr...@ma...>]

Hi Sumanth,

if you have your message store on some shared medium (e.g. a data base or distributed file system) 
you could have several acceptors for the same SessionID, albeit only one of them must be active at 
any time. Actually this would work out of the box given that the connection will only be tried 
against one of the acceptors at the same time.
I have to admit that there might be cases (due to network timeouts for example) when the 
counterparty already tries to connect against another node while the connection still seems active 
for the original node. This could then of course lead to a corruption or inconsistency of the store. 
So you might be better off if your application implemented a more robust way of determining the 
active node.
See also https://www.quickfixj.org/usermanual/2.3.0/usage/acceptor_failover.html

When you're all set, the configuration "RefreshOnLogon=Y" will cause to reload the message store 
from the shared medium on the next logon so that the active connector can continue where the now 
inactive connector left off.

Hope that helps.
Cheers,
Chris.


On 14.06.21 20:41, krishna sumanth Rachamadugu wrote:
> Hi Chris,
>
> Here, I'm trying to achieve the availability. Lets say, if the machine which is running QuickFIX 
> Engine went down, We won't be able to communicate with other parties until we bring it up.
>
> Thanks,
> Sumanth.
>
> On Mon, Jun 14, 2021 at 3:42 PM Christoph John <chr...@ma... 
> <mailto:chr...@ma...>> wrote:
>
>     Hi,
>
>     a FIX Session is more or less a point-to-point connection. That means the same SessionID
>     cannot be active on two different machines at the same time. The message store (with sequence
>     numbers and messages) should be accessed exclusively by one connector.
>
>     Let me ask this way: what do you want to achieve? You could of course set up separate Sessions
>     that access the same order management system for example.
>
>     Cheers,
>     Chris.
>
>
>     On 14.06.21 07:32, krishna sumanth Rachamadugu wrote:
>>     QuickFIX/J Documentation:http://www.quickfixj.org/documentation/  <http://www.quickfixj.org/documentation/>
>>     QuickFIX/J Support:http://www.quickfixj.org/support/  <http://www.quickfixj.org/support/>
>>
>>
>>
>>     Hi,
>>
>>     I'm new to FIX. I understood that it works on message sequence numbers and felt a more
>>     tightly coupled way of communication between two parties.
>>
>>     1. Can we have a number of acceptors/initiators with the same session id running on two
>>     different machines?. To be more precise, does it support multi-tenant systems?
>>
>>

-- 
Christoph John
Software Engineering
T +49 241 557080-28
chr...@ma...

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